With all the over heating threads the past few days maybe we should get some common suggestions, tech, and info all posted under one thread ..... just a thought
I agree, I have found the #1 cause on American cars over here is simply a bad radiator,if the radiator is plugged, scaled up or has rotten fins it can't dissipate heat properly.
Adding extra fans, fitting lower value thermostats or worse still removing it, water wetter etc are all band aids that won't fix the root cause of overheating issues.
Removing fan cowls is another cause I've come across a few times, and several times I have known people swapping over to a bigger or more powerful engine without considering how to deal with the extra heat it will generate.
A gasoline engine is a heat engine, the energy it produces (hp at the flywheel) is directly proprtional to to the amount of gas it burns assuming it is correctly set up to work efficiently, it's one of the laws of physics.
Of course a large book could be written outlining all the possible overheating causes but if your engine can't handle long distance at speed, gets hot towing or seems to mysteriously use a bit of water without any leakage signs a new radiator is the most likely cause.
When our cars were new they ran fine with the factory cooling system, if your car is unmodified and in reasonable shape but overheats the fundamental cause needs to be fixed, the band aids I mentioned above are addressing the symptoms, not the cause.
'87 Olds Delta 88.